Section 2-- Identification and Function of Parts 2-47
© 2008, Satake USA Inc.
(ALL RIGHTS RESERVED)
2.22 FEEDER DRIVER PCB (See Figure 2-27)
The Feeder Driver PCB, in conjunction with the feeder rate control from the operator
interface determines the amplitude of feeder vibration.
The offset potentiometers correct for cable and other operating interference, and
should be adjusted first. They are set at the factory, and normally should not
require adjustment. The offset generated by a given feeder may not be the same as
the offset generated by another feeder. Consequently, each feeder is labeled to
identify its proper operating location. Should a feeder be changed or the operation
of the feeder become unstable, the adjustment procedure is as follows:
A. Allow a minimum of 10 minutes warm-up time from Power-On without
running the feeders.
B. With a Digital Multi-Meter, measure the DC voltage at TP1, TP2 and
TP3, using the card cage frame as ground.
C. Adjust the offset voltage using R4 to produce +20 to +25 millivolts at
TP1.
D. Repeat for Feeder 2 using R5 and TP2 and for Feeder 3 using R6 and
TP3.
The balance potentiometers R1, R2 and R3 are initially set to the maximum
clockwise position. After the Feeder Driver setup is complete and product is
running, the balance pots will be turned down as needed so that all feeders deliver
product at the same rate when the main feed rate control is set to its normal
operating position.
LED DS1 will blink green occasionally to confirm communication with the control
computer.
2.23 EJECTOR CONNECTOR PCB (See Figure 2-28)
There are four Ejector Connector PCB’s located in the front of the viewer enclosure.
Each board provides a connection point for 20 Ejectors. Mounted on each board is a
fuse holder for each of the 20 ejector circuits.
2.24 SYSTEM INTERFACE PCB (See Figure 2-29)
The System Interface PCB is installed on systems that will be connected to a remote
computer or to an external electrical system such as a programmable logic
controller.
2.24.1 REMOTE COMPUTER CONNECTIONS
Connector TB1 provides for connection of a serial communications interface to a
remote computer, using either RS-232 interface for single machine installations
where the computer is located within 25 feet of the machine or RS-485 interface for
distances greater than 25 feet. Multiple machine installations require the use of the
RS-485 interface. Most machines are configured at the factory to use RS-485.
Contact the factory for details on remote communication.
The signal identification shown is relative to the ScanMasterII. As an example, the
RS-232 signal “TX” (transmit) must connect to the computer “RX” (receive)
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